@Book{Recknagel1878,
author  = "Recknagel, Georg",
title   = "Theorie des natürlichen Luftwechsels",
year    = "1878",
address = "München",
series  = "Sitzungsberichte",
volume  = "1878,13",
url     = "https://publikationen.badw.de/en/003899455",
}